Reply To: The Riddle Thread….

November 18, 2008 9:01 pm at 9:01 pm #1067805

squeak

Participant

34 2/7 MPH is correct. Nice!

A simple formula that I derived to solve this equation is

time * (2 * Miles1/hour * Miles2/hour) / (Miles1/hour + Miles2/hour)

1 hour * (2 * 40 * 30) / (40 + 30) = 34 2/7